config SYS_ARCH
default "x86"
+choice
+ prompt "Run U-Boot in 32/64-bit mode"
+ default X86_RUN_32BIT
+ help
+ U-Boot can be built as a 32-bit binary which runs in 32-bit mode
+ even on 64-bit machines. In this case SPL is not used, and U-Boot
+ runs directly from the reset vector (via 16-bit start-up).
+
+ Alternatively it can be run as a 64-bit binary, thus requiring a
+ 64-bit machine. In this case SPL runs in 32-bit mode (via 16-bit
+ start-up) then jumps to U-Boot in 64-bit mode.
+
+ For now, 32-bit mode is recommended, as 64-bit is still
+ experimental and is missing a lot of features.
+
+config X86_RUN_32BIT
+ bool "32-bit"
+ help
+ Build U-Boot as a 32-bit binary with no SPL. This is the currently
+ supported normal setup. U-Boot will stay in 32-bit mode even on
+ 64-bit machines. When booting a 64-bit kernel, U-Boot will switch
+ to 64-bit just before starting the kernel. Only the bottom 4GB of
+ memory can be accessed through normal means, although
+ arch_phys_memset() can be used for basic access to other memory.
+
+config X86_RUN_64BIT
+ bool "64-bit"
+ select X86_64
+ select SUPPORT_SPL
+ select SPL
+ select SPL_SEPARATE_BSS
+ help
+ Build U-Boot as a 64-bit binary with a 32-bit SPL. This is
+ experimental and many features are missing. U-Boot SPL starts up,
+ runs through the 16-bit and 32-bit init, then switches to 64-bit
+ mode and jumps to U-Boot proper.
+
+endchoice
+
+config X86_64
+ bool
+
+config SPL_X86_64
+ bool
+ depends on SPL
+
choice
prompt "Mainboard vendor"
default VENDOR_EMULATION
endchoice
+# subarchitectures-specific options below
+config INTEL_MID
+ bool "Intel MID platform support"
+ select REGMAP
+ select SYSCON
+ help
+ Select to build a U-Boot capable of supporting Intel MID
+ (Mobile Internet Device) platform systems which do not have
+ the PCI legacy interfaces.
+
+ If you are building for a PC class system say N here.
+
+ Intel MID platforms are based on an Intel processor and
+ chipset which consume less power than most of the x86
+ derivatives.
+
# board-specific options below
source "board/advantech/Kconfig"
source "board/congatec/Kconfig"
bool
default n
+# The following options control where the 16-bit and 32-bit init lies
+# If SPL is enabled then it normally holds this init code, and U-Boot proper
+# is normally a 64-bit build.
+#
+# The 16-bit init refers to the reset vector and the small amount of code to
+# get the processor into 32-bit mode. It may be in SPL or in U-Boot proper,
+# or missing altogether if U-Boot is started from EFI or coreboot.
+#
+# The 32-bit init refers to processor init, running binary blobs including
+# FSP, setting up interrupts and anything else that needs to be done in
+# 32-bit code. It is normally in the same place as 16-bit init if that is
+# enabled (i.e. they are both in SPL, or both in U-Boot proper).
+config X86_16BIT_INIT
+ bool
+ depends on X86_RESET_VECTOR
+ default y if X86_RESET_VECTOR && !SPL
+ help
+ This is enabled when 16-bit init is in U-Boot proper
+
+config SPL_X86_16BIT_INIT
+ bool
+ depends on X86_RESET_VECTOR
+ default y if X86_RESET_VECTOR && SPL
+ help
+ This is enabled when 16-bit init is in SPL
+
+config X86_32BIT_INIT
+ bool
+ depends on X86_RESET_VECTOR
+ default y if X86_RESET_VECTOR && !SPL
+ help
+ This is enabled when 32-bit init is in U-Boot proper
+
+config SPL_X86_32BIT_INIT
+ bool
+ depends on X86_RESET_VECTOR
+ default y if X86_RESET_VECTOR && SPL
+ help
+ This is enabled when 32-bit init is in SPL
+
config RESET_SEG_START
hex
depends on X86_RESET_VECTOR
depends on X86_RESET_VECTOR
default 0xfffff800
+config X86_LOAD_FROM_32_BIT
+ bool "Boot from a 32-bit program"
+ help
+ Define this to boot U-Boot from a 32-bit program which sets
+ the GDT differently. This can be used to boot directly from
+ any stage of coreboot, for example, bypassing the normal
+ payload-loading feature.
+
config BOARD_ROMSIZE_KB_512
bool
config BOARD_ROMSIZE_KB_1024
to work correctly. It is not exhaustive but can save time by
detecting obvious failures.
+config FLASH_DESCRIPTOR_FILE
+ string "Flash descriptor binary filename"
+ depends on HAVE_INTEL_ME
+ default "descriptor.bin"
+ help
+ The filename of the file to use as flash descriptor in the
+ board directory.
+
+config INTEL_ME_FILE
+ string "Intel Management Engine binary filename"
+ depends on HAVE_INTEL_ME
+ default "me.bin"
+ help
+ The filename of the file to use as Intel Management Engine in the
+ board directory.
+
config HAVE_FSP
bool "Add an Firmware Support Package binary"
depends on !EFI
endmenu
+config HAVE_ACPI_RESUME
+ bool "Enable ACPI S3 resume"
+ help
+ Select this to enable ACPI S3 resume. S3 is an ACPI-defined sleeping
+ state where all system context is lost except system memory. U-Boot
+ is responsible for restoring the machine state as it was before sleep.
+ It needs restore the memory controller, without overwriting memory
+ which is not marked as reserved. For the peripherals which lose their
+ registers, U-Boot needs to write the original value. When everything
+ is done, U-Boot needs to find out the wakeup vector provided by OSes
+ and jump there.
+
+config S3_VGA_ROM_RUN
+ bool "Re-run VGA option ROMs on S3 resume"
+ depends on HAVE_ACPI_RESUME
+ default y if HAVE_ACPI_RESUME
+ help
+ Execute VGA option ROMs in U-Boot when resuming from S3. Normally
+ this is needed when graphics console is being used in the kernel.
+
+ Turning it off can reduce some resume time, but be aware that your
+ graphics console won't work without VGA options ROMs. Set it to N
+ if your kernel is only on a serial console.
+
+config STACK_SIZE
+ hex
+ depends on HAVE_ACPI_RESUME
+ default 0x1000
+ help
+ Estimated U-Boot's runtime stack size that needs to be reserved
+ during an ACPI S3 resume.
+
config MAX_PIRQ_LINKS
int
default 8
projects / oweals / u-boot.git / blobdiff